CN1057490A - Middle carbon complex alloy steel and production technology thereof - Google Patents
Middle carbon complex alloy steel and production technology thereof Download PDFInfo
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- CN1057490A CN1057490A CN 90103043 CN90103043A CN1057490A CN 1057490 A CN1057490 A CN 1057490A CN 90103043 CN90103043 CN 90103043 CN 90103043 A CN90103043 A CN 90103043A CN 1057490 A CN1057490 A CN 1057490A
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- carbon complex
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Abstract
Carbon complex alloy steel in a kind of, its chemical constitution contains 0.5～0.7%C, 0.4～0.8%Mn, 0.5～1.0%Si, 3.5～5.5%Cr, elements such as 0.2～0.6%Mo by weight percentage.It has higher hardness, intensity and impelling strength, so wear resistance is good, and about Rockwell hardness HRC55, tensile strength sigma
bGreater than 900N/mm
2Impelling strength a
k20～30J/cm
2Compare with high mangaenese steel, wear resistance is its 3 times, and is suitable with the rich chromium cast iron wear resistance, but toughness is far above rich chromium cast iron, is particularly suitable for making liner plate, bin isolation board of large and medium-sized ball mill etc.
Description
The present invention is a kind of high-abrasive material and production technology thereof, this high-abrasive material is middle carbon complex alloy steel, is suitable for making big-and-middle-sized lining board of grinder, bin isolation board, grinder hammerhead also is applicable to other similar wearing piece of operating mode in the industrial trades such as making metallurgy, electric power, coal.
At present, widely used in the world high-abrasive material is a rich chromium cast iron, and all kinds of high quality steel because mill structure and in price, at home use more widely high-abrasive material be high mangaenese steel, especially for ball grinding machine lining board, all the more so.The advantage of rich chromium cast iron is that wear resisting property is good, long service life, and HRC55～62, but the toughness of rich chromium cast iron is relatively poor, a
K4～10J/cm
2,, during the material of bin isolation board, must change the structure of these parts, otherwise poor stability is frangible as lining board of grinder.In addition, contain a large amount of precious metals in the rich chromium cast iron, thus the cost height, costing an arm and a leg, all kinds of high quality steel have similar situation to rich chromium cast iron, are not suitable for China's national situation.Domestic widely used high mangaenese steel is characterized in that price is lower, under suitable working condition, good work hardening ability is arranged.But in ball mill, comparatively speaking, grinding element so that high mangaenese steel produces work hardening, thereby is made lining board of grinder with high mangaenese steel to the surging force deficiency of liner plate, and basic shortcoming is exactly not wear-resisting.Simultaneously,, easily produce plastic flow and bulging deformation, influenced use because the yield strength of high mangaenese steel is low.And high mangaenese steel is nonmagnetic, also is not suitable for the operating mode occasion that needs to inhale iron.In addition, some local low alloy steel that use are also arranged at home as high-abrasive material, but all kinds of low alloy steel hardness is HRC42～52 only, metallographic structure is a martensite after the thermal treatment, does not have the hard phase of disperse, is not suitable for the operating mode of abrasive wear, and it is not wear-resisting to make liner plate.And its thermal treatment process adopts oil quenching or shrend more, and technology is complicated, controls improper easy to crack.
The purpose of this invention is to provide a kind of in carbon complex alloy steel and production technology thereof, this in carbon complex alloy steel to have a wear resisting property good, wear away lowly, Rockwell hardness HRC is about 55, tensile strength sigma
bBe higher than 900N/mm
2, impelling strength a on 10 * 10 * 55mm non-notch sample
KReach 20～30J/cm
2And manufacturing process is simple, and the starting material of use source is sufficient, can organize production on a large scale, compares with the material of high alloy such as rich chromium cast iron, and cost reduces significantly and is suitable for widespread use and makes lining board of grinder, bin isolation board.
Carbon complex alloy steel in of the present invention, its composition scope is controlled at by weight percentage and contains 0.5～0.7% C, 0.4～0.8% Mn, 0.5～1.0% Si, 3.5～5.5% Cr, 0.2～0.5% Mo, all the other are iron.Its production method is, behind above-mentioned morphological element accurate dosing, in electric arc furnace or intermediate frequency (power frequency) induction furnace, carry out melting, pouring cast part then, adopt a series of thermal treatment process that foundry goods is handled at last, promptly make of the present invention in the carbon complex alloy steel wearing piece, first-class as lining board of grinder, bin isolation board, crusher hammer.And,, can also in fusion process, add proper amount of rare-earth R for further improving the range of application of middle carbon complex alloy steel of the present invention
e, vanadium V, titanium Ti, tungsten W etc.
Use middle carbon complex alloy steel of the present invention and goods thereof, have following obvious advantage.At first, middle carbon complex alloy steel hardness height of the present invention, wear resisting property is good, about Rockwell hardness HRC55, tensile strength sigma
b＞900N/mm
2, to compare with high mangaenese steel, wear resistance is its 3 times, compares with common medium carbon low alloy steel, wear resistance is its 2 times, and is approaching or suitable with the wear resistance of rich chromium cast iron.Secondly, middle carbon complex alloy steel good toughness of the present invention, impelling strength a
K20～30J/cm
2(10 * 10 * 55mm non-notch sample), far above rich chromium cast iron, when being used in the bigger operating mode of surging force (as the liner plate of large and medium-sized ball mill, bin isolation board etc.), safe and reliable.The 3rd, smelt the middle employed starting material of carbon complex alloy steel of the present invention, generally can use ordinary scrap steel, common middle and high carbon ferromanganese and middle and high carbon ferrochrome and other polynary trace alloying element, therefore the high-carbbon iron alloy consumption accounts for more than 2/3rds, of alloy amount, the starting material source is sufficient, price is lower, and cost only improves about 15% than high mangaenese steel, and far below the material of high alloys such as rich chromium cast iron.Four, contain 3.5～5.5% Cr in the carbon complex alloy steel in of the present invention, thereby have the ability of certain anticorrosive wearing and tearing, make be applied in the ball mill by wet process particularly suitable.The 5th, the metallographic structure of middle carbon complex alloy steel of the present invention is that martensite adds the carbide that lower bainite adds the disperse distribution, therefore has ferromegnetism, and this compares with high mangaenese steel is nonmagnetic, inhales at needs under the working condition of iron, has tangible advantage.
Most preferred embodiment of the present invention is as follows.With ordinary scrap steel, common middle and high carbon ferromanganese, middle and high carbon ferrochrome, a small amount of molybdenum-iron etc. is raw material, presses composition and forms, and prepares burden accurately, feasible its composition of middle carbon complex alloy steel of smelting is controlled at by weight percentage and contains 0.5～0.7% C, 0.4～0.8% Mn, 0.5～1.0% Si, 3.5～5.5% Cr, 0.2～0.5% Mo, all the other are iron.In fusion process, the multiple sampling chemical examination, according to measurement result, the molten steel composition is adjusted, make it to meet above-mentioned requirements.
In electric arc furnace or intermediate frequency (power frequency) induction furnace, smelt good molten steel by above-mentioned requirements, through casting with after leveling, again through thermal treatment process just can make of the present invention in the carbon complex alloy steel work.Concrete way is, is tapping about 1520～1560 ℃ at liquid steel temperature, then with pouring molten steel (the wooden model washing shrinkage is by 1.8～2.0% considerations) to the casting mold of making in advance in, treats that foundry goods, can unpack and level after at least 6 hours at the sandbox internal cooling.Thereafter, make foundry goods be warming up to 940～980 ℃ austenitizing temperature again, be incubated about 2 hours, then behind air-cooled or fog cooling to 450～550 ℃, again through air cooling to room temperature, next low-temperaturetempering 4～6 hours again, low tempering temperatures is controlled at 280～400 ℃, the use after air cooling can be installed to the room temperature.
Carbon complex alloy steel in of the present invention, according to use occasion, can carry out some restrictions to chemical constitution, increase the flexible occasion for needs, as the bin isolation board of grinding machine, the chemical constitution of carbon complex alloy steel contains 0.5～0.6% C by weight percentage in can selecting, 0.5～1.0% Si, 0.4～0.8% Mn, 3.5～4.5% Cr, 0.3～0.5% Mo, all the other are iron.For the lower slightly occasion of toughness reguirements, as the liner plate of grinding machine, the chemical constitution of carbon complex alloy steel contains 0.6～0.7% C by weight percentage in can selecting, 0.5～1.0% Si, 0.4～0.8% Mn, 4.5～5.5% Cr, 0.2～0.4% Mo, all the other are iron substantially.
According to the research trial result, carbon complex alloy steel in of the present invention, in actual applications, can also add some other elements, for example can in smelting process, add one or more following column element, and the weight percent that they are contained is 0.1～0.3% V in middle carbon complex alloy steel, 0.1～0.2% Ti, 0.02～0.06% Re, 0.3～0.5% W.The purpose that adds vanadium is a crystal grain thinning, forms carbide Vc, thereby further improves toughness, hardness and wear resisting property.The purpose that adds titanium is with to add vanadium similar, the low price of titanium, but effect is littler than vanadium pin, has added easy embrittlement simultaneously.The purpose that adds rare earth is the refinement crystal boundary, and rotten being mingled with is to improve toughness.The purpose that adds tungsten with add vanadium, to add titanium similar, the cost of tungsten is lower than vanadium, than titanium height.
Claims (6)
1, a kind of middle polynary steel that closes of carbon is constituted by fundamental element with iron, it is characterized in that chemical constitution contains 0.5～0.7%C, 0.5～1.0%S1,0.4～0.8%Mn, 3.5～5.5%Cr, 0.2～0.5%Mo by weight percentage.
2, by the described middle carbon complex alloy steel of claim 1, it is characterized in that chemical constitution contains 0.5～0.6% C by weight percentage, 0.5～1.0% Si, 0.4～0.8% Mn, 3.5% Cr, 0.3～0.5% Mo.
3, must ask 1 described middle carbon complex alloy steel by power, it is characterized in that chemical constitution contains 0.6～0.7% C by weight percentage, 0.5～1.0% Si, 0.4～0.8% Mn, 4.5～5.5% Cr, 0.2～0.4% Mo.
4, must ask 1,2 or 3 described middle carbon complex alloy steels by power, it is characterized in that the chemical constitution precentagewise also contains one or more column elements down: 0.1～0.3% V, 0.1～0.2% Ti, 0.2～0.06% Re, 0.3～0.5% W.
5, must ask 1 by power, 2 or 3 described middle carbon complex alloy steels, when it is characterized in that utilizing this steel to make wear parts, earlier with 1520～1560 ℃ of pouring molten steel moulding, foundry goods cools off to unpack later in 6 hours in sandbox at least to be leveled, reheat is to 940～980 ℃ of austenitizing temperatures, and insulation on this temperature about 2 hours, then through air-cooled or mist is cold is cooled to 450 ℃～550 ℃, again through air cooling to room temperature, and carry out low-temperaturetempering, and temperature is controlled at 280～400 ℃, and last air cooling is to room temperature.
6,, it is characterized in that it is 1.8～2.0% that wooden model shrinks by the castmethod of the described middle carbon complex alloy steel of claim 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90103043 CN1057490A (en) | 1990-06-21 | 1990-06-21 | Middle carbon complex alloy steel and production technology thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90103043 CN1057490A (en) | 1990-06-21 | 1990-06-21 | Middle carbon complex alloy steel and production technology thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1057490A true CN1057490A (en) | 1992-01-01 |
Family
ID=4877883
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90103043 Pending CN1057490A (en) | 1990-06-21 | 1990-06-21 | Middle carbon complex alloy steel and production technology thereof |
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|---|---|
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102220544A (en) * | 2011-05-23 | 2011-10-19 | 尚宗文 | Steel material of hot-working die and its production process |
| CN103993234A (en) * | 2014-04-23 | 2014-08-20 | 中建材宁国新马耐磨材料有限公司 | Medium carbon and chromium alloy steel wear resistant liner and making method thereof |
| CN103990517A (en) * | 2014-05-30 | 2014-08-20 | 顾开明 | Two-bin blind plate for ball mill |
| CN104988418A (en) * | 2015-05-26 | 2015-10-21 | 四川鸿舰重型机械制造有限责任公司 | Vanadium-titanium alloy semi-autogenous mill wear-resisting liner plate |
| CN112375985A (en) * | 2018-11-06 | 2021-02-19 | 江苏省无锡交通高等职业技术学校 | Steel for needle valve body of extra-high pressure common rail fuel injection system of diesel engine under severe working conditions |
-
1990
- 1990-06-21 CN CN 90103043 patent/CN1057490A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102220544A (en) * | 2011-05-23 | 2011-10-19 | 尚宗文 | Steel material of hot-working die and its production process |
| CN103993234A (en) * | 2014-04-23 | 2014-08-20 | 中建材宁国新马耐磨材料有限公司 | Medium carbon and chromium alloy steel wear resistant liner and making method thereof |
| CN103993234B (en) * | 2014-04-23 | 2016-01-20 | 中建材宁国新马耐磨材料有限公司 | Chromium alloyed steel abrasion-proof backing block and preparation method thereof in carbon in one |
| CN103990517A (en) * | 2014-05-30 | 2014-08-20 | 顾开明 | Two-bin blind plate for ball mill |
| CN104988418A (en) * | 2015-05-26 | 2015-10-21 | 四川鸿舰重型机械制造有限责任公司 | Vanadium-titanium alloy semi-autogenous mill wear-resisting liner plate |
| CN112375985A (en) * | 2018-11-06 | 2021-02-19 | 江苏省无锡交通高等职业技术学校 | Steel for needle valve body of extra-high pressure common rail fuel injection system of diesel engine under severe working conditions |
| CN112375985B (en) * | 2018-11-06 | 2022-04-19 | 江苏省无锡交通高等职业技术学校 | Steel for needle valve body of extra-high pressure common rail fuel injection system of diesel engine under severe working conditions |
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